Method of making wheels.



No. 848,927. PA TENTED APR. 2, 1907.

I G. T. SCHOEN.

' METHOD OF MAKING WHEELS.

APPLICATION FILED JUNE 25, 1906.

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CHARLES T. SCHOEN, or

MOYLAN, PENNSYLVANIA.

METHOD OF MAKmG WHEELS.

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' Application filed June 25.

Specification of Letters Patent.

Patented April 2, 1907. v

1906. SeriaLNo. 323.401.

To all whom it may concern.-

' Be it known, that I, CHARLES T. SoHoEN, a citizen of the UnitedStates, residing at Moylan, in the county of Delaware and State withtheir product between.

of Pennsylvania, have invented a certain new and useful Improvement inMethods of Making Wheels, of which the followingis a .full, clear, andexact description.

In making Wheels from blanks of wrought metal the operations'of shapingthe blank for the subsequent operations of shapin the wheel have beencostly in time and Fabor, and where the blank has been sheared in orderto make it circular and of approximate 'Wheel size there has beenconsiderable waste of metal.

In the present invention these expenses are ractically eliminated, sincethe angular blan cut from rolled, preferably steel, stock is either of asize .to be droppedinto the pressing-dies or of such size as to requireonly the nipping off of its corners to permit it to be dropped in suchdies, and it is of the ap proximate Weight of.the finished wheel, andthen while plastic it is subjected to die-pressure on its fiat sides,whereby it is caused to flow out and fill up the matrix. In this way awheel may be producedwith or Without a flange and dished or coned ornot, as desired,

or a blank may be produced requiring to. be'

rolled and dished or coned, if desired, in order to complete its finishor to have cogs or teeth out in its rim to form a gear-wheel:

In the accompanying drawings, illustrating the invention, in the severalfigures of which like parts are similarly designated, Figure 1 shows asuitable blank in edge and lan views. Fig. 2 shows in plan view, fulllines, the blank with its four corners nipped and indicating by dottedlines a die-matrix. Fig. 3is a cross-section of the first-operation dieswith their product between. Fig. 4. is a plan View of the product of thefirst-operation dies. Fig. 5 is a cross-section of the. second-operation'dies with their product between. Fig. 6 is a cross-section of thepunched wheel. Fig. 7 1s a cross-section of a pair of dies for dishingor coning the wheel Fig. 8 is a cross-section of the product of the diesof Fig. 7. I Fig. 9 is an heel of Fig. 5 .or of Fig. punched and readyfor use or such other finishing as may be required to fit it for anyspecial use. Fig.

10 is'a cross-section of a-pair of dies withtheir product between forforming a wheel or elevation of the cari. blank that may be gear cut.Fig. 11 .is 'a cross-section, and Fig. 12. is an elevation,.of theproduct of thedies of Fig. 10. The blank 1 of Fig. '1 is of selectedrolled stockacut to size and free of imperfections. 'i It is'preferablyof steel and is treated hot or in such a state of plasticity as to flowunder i the pressure of the dies. It may have its 1 corners or anglesnipped off, as seenin Fig. 2 or if the female die is large enough thisnipping of the corners may be omitted. The blank is dropped into thefemale die 2 (shown in Fig. 3 and represented by the dotted circle inFig. 2) and subjected to pressure by the male die3, with the resultthatthe metal is-displaced to form the rudimentary hub 4, web 5, and rim6/ The female die'hasthe peripheral wall f equal height to the thicknessof the blank and also has the outwardlyhas the'central projection 9,between which and. the projection 8 the rudimentary hub is formed. .Themale die 3 has a flat portion 10, an annular sloping projection 11,complemental t'o projection 8, and'a projection 12, complemental toprojection 9. The metal of the blank is displaced by the projections and.forced outradrally by the sloping projections. The product of the dies,Fig. 3, is

dies Band 14, Fig. 5, wherein the annular projections 15 16 are flat andserve to flatten out the web, and cavities 17 and 18 are provided toform a flanged rim.

If the wheel is to be dished orconed, then there may be used after thedies of Fig. 5 or in place of them the pair of dies shown in Fig. 7,wherein 19 is a female die having the rim-high wall 20, rim-cavity21,annular projection 22 of -a profile to form and dish or cone the web,and the hub-cavity 23. The complemental' male die 24 has the flat portion 25, web-forming projection 26, and hubcavity 27 As indicated, thispair of dies may be used for a third operation upon the product of thedies of Fig. 5, or the operation performed by the two pairs of dies whenused separately may be combined in the pair of dies of Fig. 7. Y'

' In operating blank is subjected to pressure sufiicient to cause themetal to flow freel and assume the contour of the die-faces, f ling outcom pletely into a perfectly rounded and symmetrical wheel, which isafterward punchcsloping annular projection 8, between which and the wallthe rim'is formed, and it also then transferred to and acted upon by theI the dies, Fig. 5 or 8, the

IIO

to obtain theaxle-hole and may be or not further treated by rolling,machining, milling, or other procedure in accordance with therequirements of the user. In point of fact the Wheel as it comes fromthe dies of Fig. or Fig. 8 with its axle-hole punched is finished. Ifdesired, the projections for forming the web-may be sloped so as to makethe web thinner next to therim. In making fiangeless' wheels for use assuch or for cutting'with gear-teeth the blank is treated as before, butthe second operation dies, Fig. 10,.are used insteadof those shown in Fi5,"or these dies'may be used alone and t e entire process carried outinthem. These dies comprise the female die 28, having the rim-cavity 29and the rim-highwall 30, the web-formingilat annular projection- 31, fand the lrfib-forming projection 32, andlthej,

" male die 33, having a flat portion 34, cooper.-

ating with the rim-cavity 29, thefiatannular projection 35,cooperatingwith the web-forming projection 31, and the projection 36,cooperating with the hub-forming projection 32. The product, Figs. 11and 12, of these dieshas its hub-hole punched out, and then its rim isfinished for any desired purpose,- but particularly may be out withgear-teeth. -It will be observed that the die-pressure is broughtdirectly upon the flat sides of the s, blank in its. course oftreatment, and the rounding of the produet,is effected by displacementor flowing of the metal by such pressure within the preformed cavitiesofthe dies.

, By the method described it is possible to avoid the expense'ofrounding the'blank by forging, and it is also possible to avoid thewaste of metal by shearing it round. The wheel orblank is perfectlyrounded in the dies by the ressure to which it is subjected.

The pro nets of the 'process herein .described form the subjects ofseparate cases of even date herewith," one of which since filing hasbecome Patent No. 834,761, dated October 30, 1906, and the other isSerial No. 323,403; a 1 What Ijclaim is r E- j 1. The method. of makingwheels having a hub, a web, and a rim, which consists in angular flatlilank of the a proximate" weight of the finished wheel an subjecting.the'blank to pressure on its flat sides only in circular dies withinwhich the blank is circumferentially confined during the pressingoperation and dishing or coning the wheel while so confined. r i

In testimony whereof I have hereunto set my hand this 22d day of Julie,A. D. 1906.

CHARLES T. SCHOEN. Witnesses:

I M. R. JAcKsoN,

HARRY M. KURTZ.

